Q: Kia Sporate Engine check light issue and car stalled this morning!

I have a Kia Sportage 2005 which I bought as a student. It has 145k miles on it and i have tried to fix the engine check light issue in the past but it always shows up. I went to two different mechanic before and both of them changed my spark plug and some wires in connection to fuel injection system. It hasn't even been eight months from my past mechanic visit and the engine check light came on again. From past 2 weeks I had the engine check light on and I went to autozone to check what the issue was. They said the code was p434 and said I had issues with fuel injection system or with fuel cap. I neglected that issue and this morning when I tried to start my car and the engine didn't crank. What might be a possible reason for that? What should I be doing? My car is seating at home and I don't have any equipment to check the car is this is a battery issue or an engine problem.

Thanks for the help!

My car has 145000 miles.
My car has an automatic transmission.